GregBrannon is exactly right. I was pointing out what is obvious in the code that explains the reason the program output is unaffected by your input. It looked rather strange to me at that time why you would want to loop through the call 10 times, but now that the assignment text has been included in the original post, I can see the reason for it.
Write a method named FallingDistance that accepts an object's falling time (in seconds) as an argument. The method should return the distance, in meters, that the object has fallen during the time interval. Demonstrate the method by calling it in a loop that passes the values 1 through 10 as arguments, and displays the return value.
It is the demonstration part that calls for the loop. Notice that it doesn't ask for the ability to accept user input. It only asks for the display of the falling distance at falling times of 1 sec to 10 sec, inclusive. So, you should be able to answer your question: "does this part of the question mean it should only accept numbers 1-10." What do you think?